Model 47065 not building past 60 psi - Jeff fixes

by Jeff
(Portland, or )

I have a central pneumatic 47065 compressor that was not building past 60 psi.


i called harbor freight but no parts are available.

So I went to auto zone and picked up some gasket material.

The flapper valve over the cylinder was fine however the exhaust u shaped flapper had broken in half

I traced this out so I can find some stainless to cut out in the meantime I was able to adjust the flappers to cover all three holes

once I did this I created two new gaskets.

Also I could not find torque specs for the head bolts I did 10 lbs and the unit is working for now however this is a temp fix until I can find the stainless to make a new flapper valve
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Parts supply is always a problem for Central Pneumatic / Harbor Freight air compressors if they are only a few years old, it seems.

I have seen some folks make flapper valves out of the blades of paint scrapers. Might be an option for you since you have the template already - a pretty low cost solution if it works.

Cheers,

Bill

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model 47065 goes to 20lbs. and then stops?

by Don Jenkins
(Atwater Ohio)

I have a model 47065 air compressor and it will not hold the tank pressor. It goes to 20lbs. and then stops. When I shut it off the part of the compressor runs afterwards? Any ideas?
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Sounds like a few problems, Don, but let's see if we can figure out why your Central Pneumatic 47065 air compressor is giving you problems.

You say it goes to 20 PSI and stops, but then, when you shut it off, something keeps running?

What is the purpose of shutting it off if it has stopped at 20 PSI?

It is the pressure switch that controls the on / off of the compressor normally. If the pressure switch is what is shutting the compressor off at 20 PSI, then I would surmise that it is the switch that is the problem.

Can you identify what is running on the compressor when you turn it off? Shutting it off kills the power to the compressor, so I have no idea what might be running after power shut down.

Please provide as much more info here as a comment as you can.

Thanks,

Bill

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#47065 very slow for a second then turned off

I have a 47065 verical 21 gal compressor. I turned it on when it was very cold and it ran very slow for a second then turned off is there a reset switch? If so where is it located.
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I think yours is their 4 HP model, which does not appear to be offered any more. They seem to jump from a 2 Hp to a 5 HP motor size.

If there is a reset on the motor, it is likely on the end.

According to Harbor Freight, you should be able to get that question answered by calling their tech service department at...

1-800-444-3353

Cheers,

Bill


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Central Pneumatic 47065 compressor will not hold pressure.

by mitch
(central florida)

Central Pneumatic 47065 air compressor

Central Pneumatic 47065 air compressor

I have a CENTRAL PNEUMATIC #47065 compressor.
It will not hold pressure.

after removeing the pressure switch a rubber seal or diaphram was found to be cracked ..

It measures approximatly 1 3/4" by 1 3/4'
where can this part be located.

Harbour freight was of no help.
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Mitch, if I am correct in understanding that it is the diaphragm in the pressure switch that has failed, and that is typically a consumable in pressure switches depending on the cycle frequency of the compressor, then you may be out of luck for parts.

The good thing is, you can pick up a new pressure switch for $20-$30, not worry about getting parts for the older pressure switch, and be back in business very quickly.

Or, you can check out the pressure switch for details about who made it for Harbor Freight, and contact that company directly to try and get parts, the by the time you factor in the time you will spend trying to find parts, and then figuring out how to reassemble the switch after you have removed the springs and points to get to the diaphragm, from a time perspective it would likely be cheaper to get a new one.

Cheers,

Bill



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Nov 30, 2014
Inner tube diaphragm replacement for compressor
by: Bill

Great tip, Jeff.

By diaphragm, are you referring to the one in the regulator?

Thanks,

Bill

Nov 30, 2014
Pressure switch diaphragm failure
by: John

The diaphragm on my 47065 failed. I cut a replacement out of old inner tube rubber, and it is still working.

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